CreateDirectory["dir"] creates a directory.
CreateDirectory creates a subdirectory of your current working directory.
The directory created by CreateDirectory is initially empty.
CreateDirectory returns the full name of the directory it creates, and $Failed if it cannot create the directory.
CreateDirectory has attribute Listable.
See Section 2.12.6.
See also: DeleteDirectory, RenameDirectory, CopyDirectory.
New in Version 2.